How to make rats lose weight?

Obviously it's done to diet and exercise. The exercise part is fine they get out for two hours a day (is that enough?) in their play room.
But I'm not sure what is best to feed them to help them lose weight. Like fruit has sugar in it so would things like nuts, seeds and vegetables be a good idea? What... show more Obviously it's done to diet and exercise. The exercise part is fine they get out for two hours a day (is that enough?) in their play room.
But I'm not sure what is best to feed them to help them lose weight. Like fruit has sugar in it so would things like nuts, seeds and vegetables be a good idea? What about meats?

Can't get them into a vet until after Christmas and I only got them this week from someone and it wasn't exactly planned for my to get these pets. I've had rats before but none of them got this fat. These rats have fat rolls lol.

Thanks for any advice.

Update: Totally forget to mention these rats are about 31/2 years old so sleep most of the time and aren't really interested in being active for too long.

Well, you might search up healthy varied diets for rats. As they get older, their dietary requirements change a bit, the don't need as much food, and there are diets you can find for rats past their prime.
Exercise and activity is good as long as they don't exhaust themselves.
A little meats like cooked chicken and liver is good for them, or you might consider feeder insects like mealworms.
Just keep any diet changes slow, flooding with a diet change is not good for rodents.

2 hours out of their cage should be plenty as long as their cage is a decent size (at least 2 cubic feet per rat). Their cage should be set up for exercise. At 3.5 years you may not be able to do too much. Normally I would recommend you take out all ramps and put ropes and branches for them to get around as well as take out any large levels to open up space to put climbing toys. If possible, do that. You don't want to make it impossible for them to get around though.

Grains and veggies should make up the bulk of a rats diet followed by meat and fruit with little bits of nuts, seeds etc. If you haven't done on homemade rat diets, do that.

Scatter feed. Ditch a food bowl for dry foods. Sprinkle food around their cage. This helps prevent over eating and gets them moving.